找闰年（方法1）

#define _CRT_SECURE_NO_WARNINGS 1

#include<stdio.h>

int main()

{

int year = 0;

for (year = 1000;year<3000;year++)

{

 if ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0)

  printf("%d ", year);

}

return 0;

}